Which Mac is best for a home recording studio?

Hi, I've been looking at Mac's for a while and still don't know enough to make a purchase. I'm looking for a laptop and a desktop. I've mostly looked into the MacBook Pro 15'', as well as a Mac mini. I don't have the money for Mac Pro.

My overall criteria include the following;

For laptop:
-15'' display
-8 Gb of RAM
-at least 500Gb HD
-needs to be powerful enough to run multipul programs at once

For a desktop:
-8Gb of RAM
-At least 500 Gb HD
- also needs to be powerful enough to run multipul programs at once

Mac

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